Get Ready to fuel up with JAZ Aluminum Fuel Cells. Made from 5051 aluminum, these TIG welded fuel cells offer the best quality and value for your hard earned dollar. Available in multiple types and capacities, you are sure to find one that you will fit your application. They are filled with aviation foam for your safety and also feature an aircraft style cap. Although all JAZ fuel cells exceed SFI specs, they Do Not come with SFI certification.